egypt, at good prices. and we are helping people work here, you are helping people produce here, you are helping the egyptian economy in return. >> but growing potatoes in the desert takes a lot more water than in germany. and transporting the potatoes to europe also consumes a great deal of energy. they're fresh and tasty, but egyptian potatoes pay a high price when it comes to environmental impact. christoph schÄfer is taking on the egyptian competition. he wants to be able to sell his potatoes in the spring,too. >> we're building a potato warehouse so that we can sell our potatoes year-round. that's our current project. we want to store our own potatoes, and then sell them on the market. >> in cairo, wholesalers go to the al um market to buy potatoes. the shish family has been dealing in potatoes for generations. they prefer to sell to russia and europe, where they get top prices. >> egyptian potatoes are higher in quality. that's been demonstrated by objective criteria. there are quality controls, and